diff options
| -rw-r--r-- | ufs-utils/dlabel.c | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/ufs-utils/dlabel.c b/ufs-utils/dlabel.c new file mode 100644 index 00000000..dbae0457 --- /dev/null +++ b/ufs-utils/dlabel.c @@ -0,0 +1,81 @@ +/* Get the disklabel from a device node + + Copyright (C) 1996 Free Software Foundation, Inc. + + Written by Miles Bader <miles@gnu.ai.mit.edu> + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License as + published by the Free Software Foundation; either version 2, or (at + your option) any later version. + + This program is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#include <errno.h> +#include <hurd.h> +#include <mach.h> +#include <string.h> +#include <device/device.h> +#include <mach/sa/sys/ioctl.h> /* Ick */ +#include <device/disk_status.h> + +static error_t +fd_get_device (int fd, device_t *device) +{ + error_t err; + string_t name; + int class, flags = 0; + size_t block_size; + off_t *runs = 0; + char *misc = 0; + size_t runs_len = 0, misc_len = 0; + file_t node = getdport (fd); + + if (node == MACH_PORT_NULL) + return errno; + + err = file_get_storage_info (node, &class, &runs, &runs_len, &block_size, + name, device, &misc, &misc_len, &flags); + if (!err) + { + if (runs_len != 2 || runs[0] != 0 || class != STORAGE_DEVICE) + /* This doesn't seem to be a handle on the whole device; be picky. */ + err = ENODEV; + if (runs_len) + vm_deallocate (mach_task_self (), (vm_address_t)runs, runs_len); + if (misc_len) + vm_deallocate (mach_task_self (), (vm_address_t)misc, misc_len); + } + + mach_port_deallocate (mach_task_self (), node); + + return err; +} + +error_t +fd_get_disklabel (int fd, struct disklabel *label) +{ + device_t device; + error_t err = fd_get_device (fd, &device); + + if (! err) + { + mach_msg_type_number_t label_len = sizeof *label / sizeof (integer_t); + + err = device_get_status (device, DIOCGDINFO, + (dev_status_t)label, &label_len); + if (!err && label_len != sizeof *label / sizeof (integer_t)) + err = ERANGE; + + mach_port_deallocate (mach_task_self (), device); + } + + return err; +} |